Electron-ion thermal equilibration after spherical shock collapse
Author(s)Rygg, J. R.; Frenje, Johan A.; Li, C. K.; Seguin, Fredrick Hampton; Petrasso, Richard D.; Meyerhofer, D. D.; Stoeckl, C.; ... Show more Show less
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A comprehensive set of dual nuclear product observations provides a snapshot of imploding inertial confinement fusion capsules at the time of shock collapse, shortly before the final stages of compression. The collapse of strong convergent shocks at the center of spherical capsules filled with D[subscript 2] and [subscript 3]He gases induces D-D and D-[superscript 3]He nuclear production. Temporal and spectral diagnostics of products from both reactions are used to measure shock timing, temperature, and capsule areal density. The density and temperature inferred from these measurements are used to estimate the electron-ion thermal coupling and demonstrate a lower electron-ion relaxation rate for capsules with lower initial gas density.
DepartmentMassachusetts Institute of Technology. Plasma Science and Fusion Center
Physical Review E
American Physical Society
Rygg, J. R. et al. “Electron-ion thermal equilibration after spherical shock collapse.” Physical Review E 80.2 (2009): 026403. (C) 2010 The American Physical Society.
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